Measurement of the Bs effective lifetime in the J/psi f0(980) final state
LHCb Collaboration: R. Aaij, C. Abellan Beteta, A. Adametz, B. Adeva,, M. Adinolfi, C. Adrover, A. Affolder, Z. Ajaltouni, J. Albrecht, F. Alessio,, M. Alexander, S. Ali, G. Alkhazov, P. Alvarez Cartelle, A. A. Alves Jr, S., Amato, Y. Amhis, L. Anderlini, J. Anderson
TL;DR
This paper reports a precise measurement of the Bs meson effective lifetime in the J/psi f0(980) decay mode using LHCb data, providing insights into the decay width of the heavy Bs eigenstate.
Contribution
The study presents the first measurement of the Bs effective lifetime in the J/psi f0(980) channel, translating it into the decay width of the heavy Bs mass eigenstate.
Findings
Effective lifetime measured as 1.700 +/- 0.040 +/- 0.026 ps.
Decay width of the heavy Bs eigenstate determined as 0.588 +/- 0.014 +/- 0.009 /ps.
Results are consistent with Standard Model predictions.
Abstract
The effective lifetime of the Bs meson in the decay mode Bs->J/\psi f0(980) is measured using 1.0/fb of data collected in pp collisions at sqrt(s) = 7 TeV with the LHCb detector. The result is 1.700 +/- 0.040 +/- 0.026 ps where the first uncertainty is statistical and the second systematic. As the final state is CP-odd, and CP violation in this mode is measured to be small, the lifetime measurement can be translated into a measurement of the decay width of the heavy Bs mass eigenstate, \Gamma_H = (0.588 +/- 0.014 +/- 0.009)/ps.
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